Portable fire-extinguisher.



L. J. DOOLITTLE.

PORTABLE FIRE EXTlNGUiSHER.

APPLICAHON FILED NOV. H3, 1913.

l-llllilll Patented May 30. 1916.

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OFFICE.

LEWIS 3'. DOOLITTLE, OF SOUTH: ORANGE TOWNSHIP, ESSEX COUNTY, NEW JERSEY, ASSIGNOB TO PYRENE MANUFACTURING COMPANY, A CORPORATION OF BEL)? WARE.

Specification of Letters Patent.

Patented May 30, 1916.

Application filed November 18, 1913. Serial No. 801,671.

To all whom it may concern Be it known that I, LEWIS J. DOOLITTLE, a citizen of the United States, and resident of the township of South Orange, county of Essex, and State of New Jersey, have invented certain new and useful Improvements Portable Fire-Extinguishers, of which the following is a specification.

This invention relates to a portable fire extinguisher of the type wherein a gas is generated by chemical action when the device is in use. and the gas pressure utilized to force out a fire extinguishing liquid.

"The object of the invention isto provide afire extinguisher or the class vdescribed wherein the gas is generated in a large volume in a short period of time, whereby the extinguisher is rendered. operative at the ear lien possible moment and a positive and ellicient operation of the same assured.

In carrying out the invention a suitable container is provided for the fire extinguishing liquid. A small container filled with an acid and a receptacle containing a salt are relatively positioned so that the acid when liberated is caused-to immediately flow over and act upon a large amount of the salt simultaneously, thus causing large volume of gas to be generated in a very shortcperiod of time. The gas pressure so generated is caused to enter the container in which the fire extinguishing liquid is contained, the pressure thereupon forcing the same through a suitable pipe, by means of which it is directed upon the fire.

The peculiar and novel features of construction of a fire extinguisher embodying this invention will be described more fully hereinafter in connection with the descrip tion of the same as illustrated in the accom panying drawings.

In the drawings like parts in the several views have been given the same reference numerals.

Figure 1 is a sectional side elevation of a portable fire extinguisher embodying the invention.

' tion of Fig. 1, showing the parts in their up crating position. Fig. 3 is a sectional plan view on the line 33 of Fig. l.

The container 1 for the fire extinguishing liquid may he of any suitable shape, usually Fig. 2 is a sectional view of a por-' tending through a suitable packing to the interior of the upper portion ofthe container 1. The lower end of the stem 4 is attached to a supporting frame 5 in which the acid container 6 is carried.

The acid container 6 is pr died with a doublebott'oni formed by the ails 7 and S dividing the same into two sections, both of which are filled with an acid. A knife edge or other suitable puncturing d vice 9 is mounted upon the lover porti frame and the 1 l containe 6 no. sally rests upon the shown in Fig. 3,

One or more p p ed pins, such .1: 10, are mounted in the up azr portion of he container 1 so as to prt t downwardly through openings in the from 5, thus f0 ing a guide for the same, and having their lower or pointed ends adjacent to the upper end of the acid container 8. These pi s 16 are provid l with a shoulder adjac the lower ends thereof, the purpose of wnic will be explained more fully hereinafter.

A gas generating chamber 1]., preferably cylindrical in form and closed at both end, is suspended in the container 1, as shown in Fig. 1, and is provided with a valve 1% at the upper end thereof which is arranged to permit the gas generated therein to pass out to the interior of the container 1, where it the i exerts a pressure upon the fire extinguishing ing, etc, and. the salt upon which the acid is to act is distributed over the surface of the same in sufiicient quantity to generate the requisite amount of gas.

When it is desired to operate the fire extinguisher, the handle 3 is pulled up, raismg the frame 5 carrying the acid container '6. This upward movement first causes the sharp pointed pins 10to puncture the upper cylindrical in form and provided with a carrying handle 2 at its upper end. An operas sting handle 3 is attached to a stem 4 ex:

end of the acid container to form an airpins 10 the further upward movement of the frame 5 causes the knife edge 9 to puncture the lower wall or end 8 and then the inner wall 7. The knife 9 being tapered forms a large opening in the lower wall 8 and the point thereof a smaller Opening in the inner wall 7, the several parts then standing in the position shown in Fig. 2. As the handle 3 is now pushed downwardly the acid in the lower portion of the container 6-is released at once while that in the upper portion continues to How in a smaller amount over the salt on the spiral support 16. It will thus be seen that, on account of the construction and arrangement just described, a large amount of acid will immediately flow over the relatively large surface of salt carried on the spiral support 16, causing a chemical action which immediately produces a large volume of gas and the flow of acid being continued through the smaller opening in the inner wall '1' of the acid container 6 will continue the action and the production of gas, which passes out from the gas chamber 11 through the valve 12 and forces the liquid in the container 1 through the pipes 13 and 14 in a continuous stream.

The gas generating chamber 11 may be readily removed from the container 1 and the acid container 6 removed from the frame 5 for re lacement. The spiral support 16 17 is a so removable for the purpose of cleaning, etc.

It will thus be seen that a simple device is provided by means of which the fire extinguisher becomes instantly operative when required, not only insuring the forcing out of the fire'extinguishing liquid in a continuous stream but providing for the same being delivered at high pressure from the start. This feature is important in devices of this nature, in which the eificiency of the fire extinguisher in putting out the fire depends to a large degree upon the quickness with which the same may become operative.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention designed without departing from the scope of the appended claims, I intend that all matter contained in the above description or shown in the accompanying draw ings shall be interpreted as illustrative merely of an operative embodiment of my invention and not in a limiting sense.

What I claim is 1. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container and a spiral support upon which a salt is carried, said acid container being relatively mounted and maintained in position over the support while. the acid is messes being discharged therefrom, and means for liberating the acid from its container.

2. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container and a vertically extending spiral support upon which a salt is carried, said acid container being mounted above the upper end of said support and maintained in said position while the acid is being discharged therefrom, and means tor liberating the acid from its container.

3. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container positioned in a chamber conimunicating with said first named container, and spiral support also positioned in said chamber beneath said acid container said acid container being maintained in its position to cause the acid to flow over the support, and means for liberating the acid from its container.

at, In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container in two sections, a support upon which a salt is carried, said acid container being relatively positioned over said support, and means or liberating the acid successively from the two sections of its container.

5. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container in two sections, a support upon which a salt is carried, said acid con tainer being relatively positioned over said support, and means for liberating the acid quickly from one of said sections of the acid container and slowly from the other section.

6. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container having a double bottom, a support upon which a salt is carried, said acid container being relatively positioned over said support, and means for puncturing said double bottom.

7. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container having a double bottom, a support upon which a salt is carried, said ac d container being relatively positioned over said support, and means for puncturingsaid double bottom with openings of iti'erent sizes.

8. In a fire extinguisher, in combination, a container for the fire extinguishing fluid, and gas generating means comprising an acid container having a double bottom, a support upon which a salt is carried, said acid container being relatively positioned 130.

msnlgzw a 11s {or punctur' With openings of s in combluatien, nminguishing fluid,

2120mm sumpnsmg an gihwa l'it-y 6f sea:- api wt upon which a- :mainimr being relizXTEfHijlf-Sfl over thfi Siiwmaing the acid from its container and {01' causing the same to flow from the several sections thereof at (Eifierent rates over said. 5a support. I Signed at New York city, in the county 15 and Sta-ate of Ywzk, this 17th day of- November, 1913.

LE W 15-3 J. DOOLITTLE.

N i mews ANNA Bumssbz; LOUEULA F. Li'mmm 

